Time zones:Hawaii-Aleutian — Entire length
(NOTE: Hawaii does not observe Daylight Saving Time, meaning Hawaii-Aleutian Standard Time is UTC–10:00 year-round. This is three hours behind Pacific Daylight Time and six hours behind Eastern Daylight Time in the summer, or two hours behind Pacific Standard Time and five hours behind Eastern Standard Time in the winter.)

Counties traversed:Hawaii — Honolulu

A quick hypertext drive: I have never been to the state of Hawaii at all, much less driven any of Interstate H-2. Oscar Voss’ Hawaii Highways website has this page with a few pictures of H-2.

Interstate H-2 exists primarily to connect Wheeler Air Force Base and the Schofield Barracks Military Reservation to Honolulu and the Pearl Harbor Naval Station. It is otherwise a north-south highway that runs primarily through the central part of the island of Oahu.